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 ###Instrução: Qual foi o oponente para o jogo no Multi-sport Field?
 ###Tabelas: CREATE TABLE schedule (schedule_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Opponent VARCHAR, Home/Away VARCHAR, Field VARCHAR, Result VARCHAR) CREATE TABLE winners_of_the_yugoslavian_motorcycle_grand_prix (winners_of_the_yugoslavian_motorcycle_grand_prix_id AUTO_INCREMENT PRIMARY KEY, Year INT, Track VARCHAR, 250 cc VARCHAR, 500 cc VARCHAR, Report VARCHAR) CREATE TABLE premier_division_final_table (premier_division_final_table_id AUTO_INCREMENT PRIMARY KEY, Position INT, Team VARCHAR, Played INT, Drawn INT, Lost INT, Goals For INT, Goals Against INT, Goal Difference VARCHAR, Points 1 VARCHAR) CREATE TABLE some_differences_in_relation_to_later_editions_of_the_roman_calendar (some_differences_in_relation_to_later_editions_of_the_roman_calendar_id AUTO_INCREMENT PRIMARY KEY, Date INT, Doubles, I Class INT, Doubles, II Class INT, Greater Doubles INT, Doubles INT, Semidoubles INT, Total INT) CREATE TABLE replaced_pageants (replaced_pageants_id AUTO_INCREMENT PRIMARY KEY, Country/Territory VARCHAR, Former pageant VARCHAR, Last competed INT, New pageant VARCHAR, Franchise since INT)  
SELECT Opponent FROM schedule WHERE Field = multi-sport field